• Proceedings of the KIEE Conference
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• 1987.07b
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• pp.1471-1475
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• 1987

This paper proposes testable design of sequential NMOS PLAs. The extra bit lines and devices are added to the conventional PLAs. The time is taken to assigning devices in the extra bit lines, which is excessive in the conventional method, is reduced by using the symmetrical distance matrix of the PLA and the regular assigning method. As a result, the test patterns can be easily generated. Also, the silicon area overhead of extra hardware is low.

• Journal of the Korea Institute of Military Science and Technology
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• v.8 no.1 s.20
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• pp.25-31
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• 2005

PLA(Passive Linear Array) system has been primarily utilized to detect and track underwater targets, such as submarines. This system has difficulty in distinguishing between underwater targets and surface ships in a dense target environment. And a single-PLA system does not provide target state observability. At least two PLAs are necessary to observe a track uniquely. To classify and localize the underwater targets effectively, first of all, it is very of importance to discriminate the surface ships in the multi-target environment. These problems can be overcome by the association of distributed PLAs and radars. In this paper, we present an algorithm to solve the track-to-track association of the heterogeneous data from three PLAs and one radar are noncollocated with known sensor positions. Also, this paper shows the simulation results to verify the proposed algorithm.

• Journal of Ginseng Research
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• v.48 no.4
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• pp.428-434
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• 2024

Background: Platelet-leukocyte aggregates (PLAs) play important roles in cardiovascular disease and sepsis. Red ginseng extract (RGE) has been well-studied for its antiplatelet and anti-inflammatory activities. However, the potential inhibitory effects of RGE on PLA have not been investigated. Methods: Six-week-old ICR mice were given oral gavage of RGE for 7 days, followed by an intraperitoneal injection of 15 mg/kg of lipopolysaccharide. Mice were euthanized 24 h later, and blood samples were collected for further analysis. Flow cytometry was utilized to sort populations of PLAs and platelet-neutrophil aggregates (PNAs). By using confocal microscopy, PNAs were validated. Morphological changes in platelets and leukocytes were visualized with scanning electron microscopy. Expressions of tissue factor (TF) and platelet factor 4 (PF4) were investigated using enzyme-linked immunosorbent assay. Results: Populations of activated platelets, PLAs and PNAs, were significantly increased with LPS-induction. Treatment with 200 and 400 mg/kg of RGE decreased platelet activation. Moreover, the populations of PLAs and PNAs were reduced. PNAs were visible in the blood of septic mice, and this was attenuated by treatment with 400 mg/kg of RGE. Morphologically, sepsisinduced platelet activation and fibrin formation in the blood. This was reduced with RGE treatment. Sepsis-induced increase in the plasma levels of TF and PF4 was also reduced with RGE treatment. Conclusion: This study shows that RGE is a potential therapeutic that reduces the activation of platelets and targets PLA and PNA formation. Detailed inhibitory mechanisms of RGE should be studied.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2006.11a
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• pp.233-234
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• 2006

In this paper, Via hole pore were investigated during PLAS (PessureLess Assisted Constrained Sintering) process of LTCC. Ag and Ag-Pd paste mixture were tested for via paste. Ag paste with 10~25% Ag-Pd paste showed no via hole pore, but further increase of Ag-Pd contents in via paste increased via pore. From shrinkage curve, 10~25% Ag-Pd paste showed expansion behaviors before shrink and this phenomena result in the reduction of via hole pore during PLAS process.

• Polymer(Korea)
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• v.36 no.3
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• pp.309-314
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• 2012

To control degradation rate of biodegradable poly(lactide)s (PLA), the stereochemical PLAs with different ratios of $d$-lactide and $l$-lactide units were synthesized by the ring open polymerization and a degradation behavior was measured by a Langmuir film balance. Degradation rates of mixture monolayers on alkaline subphase were investigated as a function of optical purity of mixture component, 100, 99, 97 and 95%. As increasing their optical purity, melting temperatures of mixtures from stereocomplexation increased. The degradation rate of mixture monolayer with 100% optical purity was much slower than that of each homopolymer one and the others showed 2 step degradation behaviors. In the first step, the degradation which is faster than that of each homopolymer occurs in the uncomplexed region, and secondly, the degradation occurred in the complexed region which showed similar degradation rate to that of 100% optical purity. These results indicate that the alkaline degradation of stereochemical PLAs could be controlled by stereochemistry and stereocomplexation between enantiomer PLAs.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2006.11a
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• pp.194-195
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• 2006

개인 휴대 통신 기기의 급속한 발달로 인해 부품의 소형화, 고집적화가 중요한 요소로 대두되고 있으며 이를 위해서는 모듈내부에 3차원적인 수동소자의 내장이 가능한 LTCC (Low Temperature Co-fired Ceramics) 공정이 각광받고 있다. Embedded Capacitor를 제조하기 위해 유전율이 7.6과 6.5인 LTCC 재료를 이종접합 하여 제조하였으며 이종재료의 수축거동 차이에 의한 camber가 발생하였다. 이를 해결하고 또한 고주파 부품용 정밀회로 패턴을 구 현하기 위해 PLAS 방식의 Constrained Sintering 공정을 적용하여 camber 문제를 해결하였으며 capacitance 값이 두 이종재료의 유전율과 1:1로 비례하지 않았는데 이는 유전율 65 tape에 잔존하는 기공 때문으로 판단되며 미세구조로써 확인하였다.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.26 no.12
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• pp.924-927
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• 2013

In this study, we proposed CMP-PLAs to replace the Al heat sinks as heat sink materials, and investigated heat dissipation characteristics of the LED lighting devices using them. The crystallinity of the proposed CMP-PLA heat sinks decreased with increasing carbon nanotube contents in CMP-PLA. However, the thermal conductivity was improved with the increase of the carbon nanotube contents. The heat dissipation characteristics of the LED lighting devices using CMP-PLA heat sinks was improved with increasing carbon nanotube contents in CMP-PLA. For the LED lighting devices using CMP-PLA heat sinks with 40% carbon nanotube contents, the initial temperature measured at the heat sink plate was $27^{\circ}C$, which increased as time, and it was saturated around $56^{\circ}C$ after an hour. The LED lighting devices using CMP-PLA heat sinks are expected to be functional materials that can reduce their weight and improve their electric properties, compared to those using existing Al heat sinks.

• Journal of Korea Technical Association of The Pulp and Paper Industry
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• v.41 no.4
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• pp.8-14
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• 2009

Characteristics of biodegradable polymers for mulching mat for seedling were investigated. The solvent solubility of polymers is highest in methylene chloride and chloroform. Tensile strength and breaking elongation of polymer dipped paper were increased to the 0.43-1.46 kN/m and the 0.03-0.26%, respectively. PLAs had showed lower glass transition temperature and melting point than those of polyester. As a result, PLA should be most suitable polymer for mulching mat manufacturing. After biodegradation of polymers by lipase, surface of polymers was change to more flat due to enzymatic degradation.

• Proceedings of the KIEE Conference
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• 1987.07b
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• pp.1507-1511
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• 1987

This paper proposes a NAND-NAND logic sequential Programmable Logic Array (PLA) using CMOS technology, and test generation methods about stuck-open faults. By using LSSD (Level Sensitive Scan Design) method instead of Flip-Flops in Sequential PLA, the complex test problems of sequential logic are simplified. After generating the test sets using connection graph, regular test sequences and all transistor faults detection method in PLA are proposed. Finally, by programming these algorithms in PASCAL at VAX 8700 and adopting these to pratical CMOS Sequential PLA circuits, we proved the effectiveness of this design.

• Journal of the Korean Institute of Telematics and Electronics
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• v.26 no.10
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• pp.1606-1616
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• 1989

In this paper, the design of DYNAMIC CMOS ARRAY LOGIC which has both advantages of dynamic CMOS and array logic circuits is proposed. The major components of DYNAMIC CMOS ARRAY LOGIC are two-stage dunamic CMOS circuits and an internal clock generator. The function block of dynamic CMOS circuits is realized as a parallel interconnection of NMOS transistors. Therefore the operating speed of DYNAMIC CMOS ARRAY LOGIC is much faster than the one of the conventional dynamic CMOS PLAs and static CMOS PLA. Also, the charge redistribution problem by internl delay is solved. The internal clock generator generates four internal clocks that drive all the dynamic CMOS circuits. During evaluation, two clocks of them are delayed as compared with others. Therefore the race problem is completoly eliminated. The internal clock generator also prevents the reduction of circuit output voltage and noise margin due to leakage current and charge coupling without any penalty in circuit operating speed or chip area utilization.